【每日一练】CFA 一级（2015年）
Question：
Which of the following most accurately describes how to standardize a random variable X?
A. Subtract the mean of X from X, and then divide that result by the standard deviation of X.
B. Subtract the mean of X from X, and then divide that result by the standard deviation of the standard normal distribution.
C. Divide X by the difference between the standard deviation of X and the standard deviation of the standard normal distribution.
Answer = A
There are two steps in standardizing a random variable X: Subtract the mean of X from X, and then divide that result by the standard deviation of X. This is represented by the following formula: Z = (X –μ)/σ.
CFA Level I
"Common Probability Distributions," Richard A. DeFusco, Dennis W. McLeavey, Jerald E. Pinto, and David E. Runkle
Section 3.2
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权威名师倾情打造，助力通过金融第一考 |
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权威名师倾情打造，助力通过金融第一考 |
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双语教学，助力提升金融专业英语水平 |
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